These Fantastic Darco acoustic strings are made with value in mind. We are Fully aware that a need for value should not compromise tone or inhibit your musical creativity, thats why these Darco acoustics guitar strings are made from 92/8 Phosphor Bronze to insure the highest quality and still be engineered and produced within strict tolerances. Gauge: EXtra Light .010 .014 .023 .030 .039 .047